I’m experimenting with some piezo transducers (sensors) to capture physical taps as
a beats per minute measure with a microprocessor.
All the filtering and debouncing of the raw piezo signal is done onboard the ATmega328 using a combination
of:

I’ve been seeing the LT1019 precision reference show up in a number of designs recently,
often as a reference for an ADC such as the LTC2400.
It is worth a closer look. In this example, I’m using the LT1019 as an external analog reference for an Arduino.